Research Library
Experimental Summaries - Plant Research Research Publications
1987
Control of four o'clock (Oxalis purpurea) in cereals.
J. R. Peirce
B. J. Rayner
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Part of the Agronomy and Crop Sciences Commons, Soil Science Commons, and the Weed Science Commons
Recommended Citation Peirce, J R, and Rayner, B J. (1987), Control of four o'clock (Oxalis purpurea) in cereals.. Department of Primary Industries and Regional Development, Western Australia, Perth. Report.
This report is brought to you for free and open access by the Research Publications at Research Library. It has been accepted for inclusion in Experimental Summaries - Plant Research by an authorized administrator of Research Library. For more information, please contact [email protected]. Trial Title: Control of Four O'clock (Oxalis purpurea) in cereals.
Trial Number: 87KA85
Location: Tambellup - K. Hams
Soil Type: Sand
Blanket Treatments: Sown to oats
Ground Preparations:
Experimental Design:
Application Record:
Sprayed: 13/8/87
Time: 1.30-3.20 p.m.
Spray Vehicle: Motor bike
Nozzle Type: 80015LP
Pressure (kPa): 125
Volume of Application (L/ha): 78
Speed of Spraying (km/hr): 8
Wind Speed (km/hr): 3-8 (SW)
Temp. Dry Bulb (°C): 14
Wet Bulb (°C): 11
Relative Humidity:
Soil Surface: Dry
At Depth: Damp
Stage of Crop: Z13.7/22
Stage of Weeds:
-21- Table 16. 87KA85 Control of Four O'clock (Oxalis purpurea) in cereals
Treatment Rate/ha % Control % Crop Yield Four damage t/ha O'clock
1 Sencor 300 g (product) 49 23 717 2 Sencor + Ally 200 g + 2.5 g 39 5 670 3 Logran 25 g 74 51 917 4 Logran 40 g 84 67 909 5 Logran + Ally 25 g + 200 g 88 77 650 6 Logran + Sencor 25 g + 200 g 73 25 785 7 Sencor + Isoproturon 200 g + 2 L 78 55 670 8 Logran + Isoproturon 25 g + 2 L 82 29 809 9 Isoproturon 2 L 50 19 749 10 Ally 5 g 83 65 737 11 Meteor* 1 kg 61 19 829 12 Brodal 150 ml 34 8 849 13 Nil 2 2 725
* Meteor is a mixture of Sencor (Metribuzin) & Dosanex (Metoxuron).
Because of the late dry season, yields were below expected. Under these vioucti dalmaywo 4=Lv.Lded LlivLc ww1.= hiyh L4up eacly afte,: th6 treatments applied. Logran 25 & 40 g, did not reflect any yield loss. The control of the weed will be assessed in 1988 from plant counts of bulbs sprouting after the break of the season.
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